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When I tried to use tvservice - o to turn off my screen which worked but when I used tvservice -p to turn back on it didn't work. Is there any way to change the time it takes to turn off the screen? The display is hdmi.

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You can go into your screensaver settings and change the time it kicks in.
Link

Although it you might be able to bring it back with a commandline of :

xset dpms force on
  • xset -display :0 dpms force off does set on the screensaver but does not turn the screen off... – Philippe Gachoud Aug 5 '15 at 11:34

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